svoking

The dash changed in 13, and my 16 has the fancier one. They display current and max at the same time but only if you f with the gear setting. It's pretty dumb you have to screw with it to display it every time. I doable checked the build sheet it is 3.42 gears not sure why i was thinking 3.23. the dam thing dose do 90 at 1900 rpm. Also a 2500 so 68rfe still looking for an answer to all my questions.

Hi guys, I'm looking for recommendations but I've got some specifics I'm looking for. I have a 2016 2500, 6.7, 68rfe with 3.42 gears. I'm not looking for high HP tunes. I'm looking for high quality tunes, increased mpg when empty(post injection needs to go!) and trans programming for when I am towing. And I have one specific thing I want done, if possible. I want the current gear displayed in drive automatically. I have reached out to two different reputable companies and they both said it's done with alfaobd, but that seems to be only true with a 2019+(yes there were informed it's a 2016 upfront) anyone have this done through tuning or alfaobd? This is my first 4th gen i finally needed to replace my 2nd gen due to rust, but i will be able to get the last 7k on it this summer so it hits 500k..

tried a few more things, i switched out clusters and the 99 pcm turns on the cc light of the 98 gas cluster. seems to suggest they are communicating fine. i installed the 98 AT pcm that is setting AT codes and no engine codes. i installed a wire and pin in c1-6 tried the cc with wire both grounded and powered and same results no cc light on dash. i don't know what the probability is that i could have 2 98 12v pcm that did not have CC, both pcm's will actuate the valves in the servo when using a scan tool to test function. I still haven't identified all the components on the ccd buss the check if there is a compatibility issue there.

clutch safety is bypassed, just left the jumper wire in the cab as i didn't have a safety switch i to install.

i have a 98 gas cluster that i have installed and tried, it dose exactly the same thing as the 99 one dose, even the tach works correctly. vacuum is good at servo. from what i read in the service manual cc is canceled when the engine rpm increases to rapidly on all engines, and this is how it is canceled if the clutch is pressed. perhaps i should switch out clusters and see if the 99 pcm turns on the cc light of the 98 that will tell me if the ccd signals are the same.

thanks for posting these to compare to, mine are the same at 4.7v, 0.93v on/off, 3.49v set, 2.86 coast, 4.17 accl. so last night I went and tried something kind of wild, I pugged the old 99 pcm into the 98 engine harness with no changes to it. key on engine off no cc, key on engine running the cc light will turn on in the cluster. this light wont even turn on with with either of my 98 12v pcm's AT or MT. now the 99 pcm will not set a target speed but my tach is not working, i have no tps signal and pin c1 6 is not populated so i wouldn't expect it to fully function. it looks like the 99 would probably run cc if i wired the c1-6 but that would leave me without my instrument cluster working and that would defeat the purpose of what im trying to do. sense 98 and 99 are clearly different i wonder if the 98 12v AT pcm needs to see 12v at the c1-6 pin before the cc will even turn on the light. i may try this with the 98 AT pcm next. given the 98 12v MT pcm is setting that p1765 code im not sure i trust it is functioning correctly internally, but the AT pcm only sets trans codes so every thing engine side seems good.

thank you that's good information to have, i will check those inputs as soon as i get a chance. I'm really surprised the cc works with no ecm talking to the pcm but that's good to know. i have to ask do all the gauges work on your instrument cluster?

so the way the harness is laid out is like this, starts at pcm runs to engine and trans then over to PDC. both the 98 12v and 99 24v are designed this way. the difference being the 24v adds the ecm but is wired to every thing else in the same manner. essentially what i did was install a 98 12v MT pcm and engine harness in a 99 24v AT truck. ive been looking for something i missed in connectors c1 c2 c3 and c130 (pcm and pdc, the only 4 connectors really involved in the swap), as far as what they do on one year versus another and they are very similar. the 98 service manual is a bit tricky with the wiring, the first set of diagrams are 12v, if you are searching the pdf and end up near the bottom of the page(page 1931 and up) you are in the supplemental 24v diagrams. and now that im looking at this is not the 98 document ive been using apparently i have saved two and the other wont upload though it looks the same. im suspect a compatibility issue on the ccd buss the PCM "logic" seeing something it doesn't like, or its not seeing at all. but i cant figure out the acronyms for the ccd modules are so im not sure what's actually talking on the ccd to start looking at that end of things. i can email you any manuals you want for the second gen you want is this doesn't post right. 1998 Dodge Ram Wiring Diagrams.pdf

thought i would mention this, my mt wiring dose not have a pin populated in the pcm at all, i also have a 98 v8 mt pcm and this pin is not populated in it either. so in 98 an mt just did not use it? dose any one know what the abbreviations on this diagram stand for? I'm not sure what there in reference to and i am trying to check compatibility of components on the ccd bus. also on a 98-99 ram what is considered to be the bcm? there's not to many modules on these trucks and I've not run into one being called a bcm. i figured out the seat belt light was on because the srs module is different between a single cab and a quad cab. swapped them and took care of that light.

so i checked the c3 pin 24 for brake sense. it is grounded with foot off pedal and then 12v when pedal is pressed.

the output from pcm to the trans relay is used on an MT for the 12v+ to the alternator. its shown in the 98 wire diagram. i would love to find someone in my area of wi i could just plug my pcm into there truck and see if its the pcm its self.

i am using pcm as 100% factory controller for everything. i know its the same circuit but being an mt there is no trans relay wired into the harness.

hmm i did not check C3 pin 24 i didn't think at was part of the CC, but ill check it to make sure its working. as for the pcm ecm ccd bus its a 98 pcm as stated so no ecm. i did confirm 98 pcm is for an MT and engine/trans wiring is for an MT. It doesn't set any AT trans codes either. i do have another pcm, it is a 98 AT 12v can the AT functions be fooled to make CC work with that pcm? i still wonder if code p1765 is the culprit..

hi guys this may or may not be in the right place for this post i was trying to get it in a forum that will get traffic by those well versed in the wiring specific to 98-99 trucks. i have a 98 ram that the CC will not turn on. the light on the dash will not turn on and attempt to work. this is not a very standard truck. the build is.. -1998 ram 1500 4x4 -4bt -nv4500 -98 MT PCM -98 cummins MT engine and transmission harness -99 2500 cummins frame, under hood and in cab wiring harness -99 2500 cummins interment cluster. CC is the only thing not working i can jump in her and it starts and runs like a 12v truck. no CEL, tach, odometer, speedometer, fuel level, engine temp, and volt gauges all work correctly. i cant find any wiring in C130 at PDC that is causing a problem. CC signals are getting from the steering wheel controls to the pcm (c3 pin 11). The CC circuit from pcm through brake switch to CC actuator is complete with foot off the brake pedal and opens when pedal is pushed.(pcm C3 pin 11 to CC actuator pin 3) speed control supply on pcm C3 pin 11 will only produce +12v when I actuate the CC vacuum/ vent circuit using my scan tool. The best I can tell the pcm is un happy and will not turn on CC. am I missing something on the 98 12v side? I know the vac brake trucks had a vac sensor that turned on the brake light but I didn’t think hyd boost trucks used this sensor? There are no codes in abs module either. I have 3 symptoms that I under stand are unrelated judging buy replies on a previous posts on there pages. -p1765 was told this is not going to stop CC any impute on this code? -p1388 I have gotten this intermittently recently but CC still doesn’t work even when its cleared. -seat belt light comes on after engine is running and will not shut off. I’m pretty disappointed I drove this using 99 under hood wiring for an at with a at in it for 12 years with the ecm flopping around and every thing was working before buying a southern truck and swapping to the MT and MT wiring during the resurrection proses.